Heating drum



Dec. 31, 1946. PENDERGRAss 2,413,578

HEATING DRUM Filed April 2, 1945' James A. PENDE'B6BN55 Mam PatentedDec. 31, 1946 UNITED STATES PATENT OFFICE HEATING DRUM James A.Pendergrass, Blanchester, Ohio Application April 2, 1945, Serial No.586,175

4 Claims.

This invention relates to heating drums for use in connection withstoves and furnaces, or for connection with the smoke-stack or stovepipe as used thereon, and the primary purpose of the invention is toprovide a heating drum for the purpose of utilizing the products ofcombustion from the stove or furnace for heating the air surrounding thedrum as located in a room located above the said stove or furnace.

Another object of the invention is to provide a heating drum of the kindreferred to, for locating in rooms above a stove or furnace, the saiddrum being constructed for trapping or retarding the hot gases passingupward through piping connected with the lower heating unit, thusincreasing the efiiciency of said heating unit, reducing fire hazards,and utilizing otherwise wasted heat units.

Still another object of the invention is to provide a heating drum ofthe kind referred to, the same being constructed in a very simple andpractical form and embodying an inner sheet iron drum preferablycylindrical in form and closed at top and bottom except for a hot airinlet at one side of the bottom and a compleniental outlet at theopposite side of the top, and additional cold air inlets through thebottom spaced inwardly from the said hot air inlet, the said inner drumbein supported in spaced relation to the fioor by means of legs, asimilar outer sheet iron drum enclosing the inner drum and sufiicientlylarger in diameter to provide there around an intermediate aircirculating space between the two drums, the said outer drum beingmarginally open at top as seated over the inner drum and supported fromthe inner drum in spaced relation to the floor, the inner drum havinglateral outlets into the top of the outer drum formed at a pointimmediately below the top outlet of the inner drum, and a fiat partitionextended angularly within the inner drum between the hot air inlet andoutlet thereof, whereby cold air as ascending into the inner drumthrough the cold air inlets of the bottom thereof, will strike upon thesaid partition in passing upward and spreading over the said partitionwill be heated by contact with the heated partition.

With the stated objects in view, together with such other and additionalobjects and advantages as may appear from the specification, attentionis now directed to the accompanying drawing as exemplifying a preferredform of the invention, and wherein:

Figure 1 is a medial vertical section through a drum assembly or unit ascontemplated by this 2 invention, as mounted within an upper room, thelower hot fiue gas inlet thereof being shown as connected with a stoveor furnace pipe extended through the floor of the room, and the upper,flue gas outlet as connected with a pip leading to a chimney or otherdischarge channel.

Figure 2 is a side elevation of the assembly of Figure 1 taken on aninety degree angle thereto at the rear side thereof, a section of theouter drum at the upper end thereof being broken away, to show the innerdrum and the air inlets thereof leading into the air circulating spacebe tween the inner and outer drums.

Figure 3 is a top plan View of the assembly of Figure 1.

Figure l is a horizontal cross section on the line 4-4 of Figure 1.

In practising this invention I provide an inner sheet iron drum 5preferably cylindrical in form and which is closed at top and bottom asindicated at 6 and '1, except for the lower hot flue gas inlet 8 throughthe bottom at one side thereof and the complemental upper flue gasoutlet 9 through the opposite side of the top. through which inlet andoutlet hot flue gases flow from the stove or furnace pipe into thechimney pipe, and except for the cold air inlet I0 through the bottomspaced inwardly from the said hot flue gas inlet 8, through which coldair inlets ID the cold air from the floor enters and passing up over theweb, baffle or partition i6 is warmed or partially heated owing to theangular disposition of this baffle and thence passes out through thelatera1 ports l5 and through the open top of the outer drum I! into theroom. This inner drum thus prepared is supported upon legs ii in aspaced relation to the floor l2 of an upper room wherein the unit ismounted. The lower hot flue gas inlet 8 is connected with the stove orfurnace pipe l3 as leading from the stove or furnace (not shown), whilethe upper flue gas outlet 9 i similarly connected with the flue orchimney pipe M. The inner drum is also provided at a point immediatelybelow the top flue gas outlet 9 and at the side of the drum with lateralair outlets into the top of the outer drum, as indicated at l5.

A flat air spreading web or partition It, also of sheet metal, isextended angularly within the inner drum 5 fro-m bottom to top thereof,between the lower hot flue gas inlet 8 through which the hot flue gasesflow into the inner drum 5 and the upper outlet 9, transversely acrossthe drum, from the inner annular margin of the lower inlet 8 to theouter annular margin of the upper outlet 9. It is to be noted that thetop of the inner drum 5 is of corrugated formation, as clearly shown inFigures 1 and 3, so that the rising hot air within said drum will beheld Within these corrugated formations and there held until it yieldsits heating quality through the top of the drum to the superposed air. Asimilar, outer sheet iron drum l1, encloses the inner drum all around,and is sufliciently larger in diameter to provide therearound anintermediate air circulating space l8 between the two drums, the saidouter drum being marginally or circumferentially open at its upper andlower ends as indicated at I9, thus causing the cold air from the floor12 of the room, to flow up through the lower cold air inlets ID of thebottom of the inner drum 5, thence up over the web or partition [6, outthrough the lateral outlets or ports l5 into the top of the outer druml1, and thence upward and out into the room, this upward flow of the airbeing caused by the heating of the air in passing up over the said webor partition I5.

The outer drum I1 is supported from the inner drum 5 by means of spacingrings 20 interposed at top and bottom horizontally between the twodrums, and anchored to each in any conventional manner. The outer drumI7 is also supported in this same manner above the floor l2, and in aspaced relation thereto, so that cold air may flow freely thereunder andup through the cold air inlets In of the bottom of the inner drum 5, andthence up and out in the manner stated. The baffle l6 functions toseparate the products of combustion or flue gases from the air beingheated.

It is thought that from the foregoing description the construction andoperation of the invention will be fully understood, and while I havehere shown and described a specific embodiment of the invention andspecific structural features thereof, this form of construction may bevaried as desired, within the scope of the appended claims.

Iclaim:

1. In a heating drum unit of the kind described, drums assembled oneabout the other with an intervening air circulating space therebetween,the said drums being supported endwise and vertically from the floor ofa room so that air may flow freely beneath the lower ends thereof, theupper and lower ends of the inner drum being closed except for a hotflue gas inlet at the lower end and at one side of the inner drum and ahot flue gas outlet at the opposite side of the upper end of the innerdrum for connecting with a, stove or furnace pipe at the lower end andwith a chimney at the upper end, the bottom of the inner drum beingformed with cold air inlets spaced inwardly of the hot air inlet, andformed at a point iremediately below the hot air outlet with lateral airoutlets leading into the outer drum, and a flat, air spreading partitionextended angularly within the inner drum from bottom to top thereof fromthe inner annular margin of the lower hot air inlet to the outer annularmargin of the upper hot air outlet, transversely across the inner drumand thus separating the lower hot air inlet from the lower cold airinlets, so that cold air passes through the unit to flow up through thelower cold air inlets up over the said fiat partition and thence outthrough the said lateral outlets into the top of the outer drum andthence outwardly into the room, and hot flue gas on the other hand mayflow continuously through the unit from bottom to top thereof andincidentally heat the said partition.

2. In a heating drum as defined in claim 1, the top of the inner drumbeing corrugated for the purpose of holding, retarding and dissipatingheat as impinged against the top.

3. In a heating drum assembly of the kind referred to, a sheet iron drumclosed at top and bottom except for a, hot flue gas inlet at one side ofthe bottom and a complemental flue gas outlet at the opposite side ofthe top there being additional cold air inlets formed through the bottomand spaced inwardly from the said hot flue gas inlet, means forsupporting the drum in spaced relation to the floor of a room, a,similar sheet iron drum inclosing the first mentioned drum and being ofsufliciently larger diameter to provide therebetween an air circulatingspace, the said inclosing drum being marginally open at the upper andlower ends thereof as seated over the other drum and being supportedtherefrom in spaced relation to the floor wherein the unit is located,the said first mentioned or inclosed drum having lateral outlets at itsupper end into the upper end of the inclosing drum and formedimmediately below the top hot flue gas outlet of the inclosed drum, anda fiat partition or bafiie of sheet iron extended angularly within theinclosed drum between the lower hot flue gas inlet and the similar upperoutlet, whereby cold air as drawn from the floor by convection and intothe drum assembly through the lower marginal opening between the twodrums, will pass over the said partition or baifie and be heated bycontact therewith and thence expelled through the said lateral outletsof the inclosed drum into the top of the inclosing drum and thence outinto the room.

4. In a heating drum unit as defined in claim 3, the top end of theinclosed drum being corrugated for the purpose of holding, retardin anddissipating the heat as impinged against said top.

JAMES A. PENDERGRASS.

